HierarchyDiff.java

/*
 * Copyright (C) 2011 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.tree.diff;

import java.util.Comparator;


/**
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 */
public class HierarchyDiff<L1, N1, L2, N2, H> {

    public static <L1, N1, L2, N2, H> HierarchyDiff<L1, N1, L2, N2, H> create(ListAdapter<L1, H> listAdapter1,
            HierarchyAdapter<L1, N1, H> hierarchyAdapter1, ListAdapter<L2, H> listAdapter2,
            HierarchyAdapter<L2, N2, H> hierarchyAdapter2, Comparator<H> comparator) {
        return new HierarchyDiff<L1, N1, L2, N2, H>(listAdapter1, hierarchyAdapter1, listAdapter2, hierarchyAdapter2,
                comparator);
    }

    /** . */
    final ListAdapter<L1, H> listAdapter1;

    /** . */
    final HierarchyAdapter<L1, N1, H> hierarchyAdapter1;

    /** . */
    final ListAdapter<L2, H> listAdapter2;

    /** . */
    final HierarchyAdapter<L2, N2, H> hierarchyAdapter2;

    /** . */
    final Comparator<H> comparator;

    public HierarchyDiff(ListAdapter<L1, H> listAdapter1, HierarchyAdapter<L1, N1, H> hierarchyAdapter1,
            ListAdapter<L2, H> listAdapter2, HierarchyAdapter<L2, N2, H> hierarchyAdapter2, Comparator<H> comparator) {
        this.listAdapter1 = listAdapter1;
        this.hierarchyAdapter1 = hierarchyAdapter1;
        this.listAdapter2 = listAdapter2;
        this.hierarchyAdapter2 = hierarchyAdapter2;
        this.comparator = comparator;
    }

    public HierarchyChangeIterator<L1, N1, L2, N2, H> iterator(N1 node1, N2 node2) {
        return new HierarchyChangeIterator<L1, N1, L2, N2, H>(this, new HierarchyContext<L1, N1, H>(listAdapter1,
                hierarchyAdapter1, node1), new HierarchyContext<L2, N2, H>(listAdapter2, hierarchyAdapter2, node2));
    }
}